In the red backed vole (a small mouse-like mammal) there are two traits under investigation.  The first trait is a distinct tuft of long hairs at the tip of the tail with a tufted tail being recessive to non-tufted tail.  The letter T is used to represent the tail tuft gene.  The second trait is a patch of red fur on the head which is known to be recessive to the more common lack of a red patch.  The letter R is used to represent this trait.  A female to be used in the cross was drawn from a pure breeding line that consistently has both the red patch on the head and a tufted tail.  The female is to be crossed with a male from a highly variable wild population.  The male used had no red head patch and a normal (untufted) tail.  The results were as follows:  7 red head patch with tail tuft, 8 no red head patch with tail tuft, 8 red head patch without tail tuft, 8 no red head patch without tail tuft.  What would the results be if the male was crossed with a female that was known to be heterozygous for both of the traits being investigated?  Please provide the phenotypes and the phenotypic ratio.

Human Anatomy & Physiology (11th Edition)
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In the red backed vole (a small mouse-like mammal) there are two traits under investigation.  The first trait is a distinct tuft of long hairs at the tip of the tail with a tufted tail being recessive to non-tufted tail.  The letter T is used to represent the tail tuft gene.  The second trait is a patch of red fur on the head which is known to be recessive to the more common lack of a red patch.  The letter R is used to represent this trait.  A female to be used in the cross was drawn from a pure breeding line that consistently has both the red patch on the head and a tufted tail.  The female is to be crossed with a male from a highly variable wild population.  The male used had no red head patch and a normal (untufted) tail.  The results were as follows:  7 red head patch with tail tuft, 8 no red head patch with tail tuft, 8 red head patch without tail tuft, 8 no red head patch without tail tuft. 

What would the results be if the male was crossed with a female that was known to be heterozygous for both of the traits being investigated?  Please provide the phenotypes and the phenotypic ratio.

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